题目内容
Falling and gravity About 400 years ago, Caltleo noticed that objects speed up, or accelerate, as they fall.
He found that heavy and light things, of the same shape and size, take the same time to fall to the ground. Gravity pulls then-* down equally.
Try this for yourself with different objects, like a slipper : and a heavy boot.
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Air resistance Objects of different shapes and sizes fall at different rates. The shape of a parachute makes people fall more slowly.
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| The air pushing against the parachute causes a lot of air resistance*. A person without a parachute falls faster because less air pushes against them. |
The faster something falls, the more air resistance there is on it. Eventually, the air resistance slowing it down becomes as strong as the pull of gravity. Then its speed no longer changes. This is called terminal speed. |
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Free fall If there were no air, there would be no air resistance. All falling objects would just get faster and faster < called is This rate. same the> free fall. | |
67. Falling objects are pulled down to the ground by .
A. gravity B. resistance C. speed D. acceleration（加速度）
68. Why do people make parachutes（降落伞）?
A. To look pretty and colourful in the air. B. To slow down the falling speed.
C. To push against the air in the sky. D. To accelerate the falling movement.
69. Which did Galileo discover?
A. A heavy ball falls faster than a light ball. B. A light ball falls faster than a heavy ball.
C. A light ball and a heavy ball fall at the same speed
D. A light ball and a heavy ball fall at different speed.
70. Which of the following is NOT true according to the passage？
A. Heavy and light objects fall equally when they are different in size.
B. When air resistance equals gravity, objects fall at terminal speed.
C. Without air; all falling objects get faster and faster at the same rate.
D. Slippers（拖鞋） and boots （靴子）fall at the same speed because they have the same shape
口算能手系列答案把下列单词填入每个句子的空白处（注意所填单词的形式变化）：
| hero quality willing active republic principle fight prison period advise continue youth league stage vote position accept violence peaceful blanket degree guard educated terror fear cruelty reward criminal president sincerely |
1 The Society for the Prevention of _________ to Animals (SPCA 动物保护协会) is a well known organization in the world.
2 The girl wrapped herself with a _________ to keep herself warm.
3 The famous actress first appeared on the _________ only in her teens.
4 The two boys who were _________ in the playground were ordered to stop.
5 People regarded him as a ________, for he saved a drowning 8-year-old boy out of a freezing lake.
6 You really deserve a _________ for being so helpful.
7 My uncle received a doctor’s _________of medicine in America in 1998 and returned to China the following year.
8 He obtained 89% of the __________ and was elected president of the Party.
9 Nelson Mandela was put in ________ a few times.
10 People often value the _________ of a product rather than its packaging.
11 The _________ was charged with robbing a bank and sentenced to death.
12 Two soliders _________ the government office building all the time.
13 My father was promoted to a higher _________ for his achievements.
14 I stayed in Japan for only a short _________ of time.
15 Those boys are so helpful that they are always ________ to help others.
16 George Bush was elected _________ of the USA a second time in 2004.
17 All my family are well _________, of whom my brother studied in Harvard University.
18 I am a Party member and never ________any bribe(贿赂) from others.
19 The doctor _________ me to take more exercise so that I can keep fit.
20 Some students are very ________ in answering teachers’ questions while others just keep silent when asked any question.
21 I _________ hope that you won’t let me down.
22 To his ________, he found a figure coming towards him in the darkness.
23 What really worries those parents is that there is too much sex and _______ on TV.
24 The rain ________ falling all afternoon. But it came to a stop by dark.
25 PRC is short for the People’s _________ of China.
26 His son has been missing for five days and now police are beginning to _______ the worst.
27 After retirement she moved to the country and lived a ________ life.
28 The _________ play an important role in building our country.
29 I have been a ________ member for 3 years.
30 Stick to your ________ and tell him that you won’t do it.
According to legend, the Bridge of Sighs in Venice, Italy, which connects the Palazzo Ducale to an ancient prison, got its name because the walk across it gave prisoners on their way to jail a final chance to appreciate the beauty of the city.
The view from the bridge today, however, is more likely to be of a giant billboard selling Bulgari or Coca – cola. Beyond the billboards, monuments are being restored. The money comes from advertising profits.
But when the Coke billboards went up this summer on buildings near the Piazza San Marco, which is at the historic heart of Venice, there was a public debate.
“We can’t commercialize everything,” said Alessandra Mottola Molfino, a Venetian. “The lesson that goes out is that a price is for everything.”
“We couldn’t stay quiet,” said Maria Camilla Bianchini d’Alberigo, president of a heritage protection association. “Too much is too much.”
There needed to be rules, she added, rules that prevent the advertising billboards clashing (冲突) with the monuments of the city.
City of officials, however, argue that without these ads, the city could not afford to maintain its heritage. Many have been damaged by centuries of wear and are even a threat to public safety.
“I can’t turn down the image of bottle when there are pieces of the Palazzo Ducale falling to the ground,” said Renata Codello, a Cultrue Ministry official.
The Culture Minister has a budget of about $ 47 million (315 million yuan) for restoration of monuments, but Italy has a rich architectural heritage, and funds are always tight．Of that amount,
$ 1.8 million was given to the entire Vector region, which includes Venice．
Two years ago, the city signed an agreement with the Dotter Group, a company responsible for the restoration of the Bridge of Sighs and the Palazzo Ducale．It allows it to sell ad space．
But there is a condition in the agreement: The ads should not offend public taste,
In August, Venice banned US actress Julianne Moore's Bulgrari ad from a billboard in the Piazza San Marco．
The photo shows a naked Moore covered with lion cubs, handbags and jewelry, Mayor Giorgio Orsoni called the image too racy (猥亵) and unsuitable for the Piazza San Marco．
"I take account of the fact that Venice is part of the real world… but we cannot accept these Hollywood-style images．There arc intelligent sponsors, and we need to come up with advertising that suits Venice, not Times Square," he said in a speech．
1.The article is mainly about in Venice
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A．restoration of cultural heritage |
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B．widespread commercialization |
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C．the conflict between ads and cultural heritage |
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D．the difficulty of restoring monuments |
2.In the first paragraph, the beautiful view from the Bridge of Sighs is mentioned to .
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A．introduce other monuments of the ancient city |
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B．show how much many ancient structures need restoring |
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C．indicate that the view is blocked by huge ads |
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D．create interest in the famous city |
3.From the article we can conclude that Rcnata Codello the advertising．
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A．is in favor of |
B．is worried about |
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C．objects to |
D．doesn't mind |
4.Why do many Venetians complain about the ads?
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A．They are intolerant of commercialization． |
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B．They feel the ads are damaging the city． |
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C．The ads are usually racy and in an American style． |
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D．The ads don't present a traditional view of Venice, |
5.It can be inferred from the passage that
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A．Hollywood stars' ads cannot go up in Venice |
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B．the mayor of Venice is expecting new advertising |
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C．the Dotter Group may stop its restoration work for lack of funds |
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D．people can buy Bulgaria or Coca-cola on the Bridge of Sighs |
MONTREAL--He may be the world’s richest man, but that didn’t prevent Bill Gates from falling for an April Fool’s day joke by two Quebec radio comics (喜剧演员) pretending to be Canadian Prime Minister Jean Chretien.
Montreal French-language station CKMF--FM said last Wednesday that staffers (工作人员) Marcantoine Audet and Sebastien Trudel had a 10-minute telephone chat with Microsoft Corp boss Gates on April 1.
The broadcast was aired on their nightly show last Tuesday and repeated last Wednesday.
“We were happy. We had been calling Microsoft persistently (坚持不懈地) for four weeks,” Trudel said.
Trudel said he and his colleague had already fooled Canadian pop singer Celine Dion and Formula One (一级方程赛车) driver Jacques Villeneuve on their show.
“This time, we wanted to give ourselves a challenge with somebody more difficult to reach,” Ttudel said.
He said he was surprised that Gates’s assistants did not check to see if it was really the prime minister’s office on the line.
Trudel said they imitated (模仿) Chretien’s heavily accented English, talking about the economy, asking about Microsoft’s Windows operating system and inviting the multibillionaire to visit a well-known Montreal strip joint (运动服合资企业).
The radio host said that Gates was not amused by the fake interview.
“He did not seem angry but he did not find it so funny,” the comic said.
1.Bill Gates was fooled mainly because ______.
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A．his assistants were not careful enough |
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B．the Canadian Prime Minister helped the two comics |
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C．the two comics imitated the Canadian Prime Minister so well |
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D．it was April Fool’s Day |
2.We can conclude from the passage that the two comics ______.
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A．liked to fool famous people on their show |
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B．thought that Gates was not a great challenge to them |
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C．had a good knowledge of Bill Gates and his Windows operating system |
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D．were not quite satisfied with their tricks |
3.Which of the following would be the best title of the passage?
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A．Gates ‘April Fooled’ |
B．Two Comics and Their Tricks |
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C．Two comics and Their Show |
D．A Fake Interview |